Need ideas to honor groom's parents at rehearsal dinner

Help me, Hive! My daughter’s rehearsal dinner is in three weeks and it’s being planned and hosted by the groom’s parents at a local restaurant. The date of the dinner is also their 26th wedding anniversary, and I would love to find a way that we could surprise and honor them at the dinner, but it’s tough since it’s not my event to plan. I have checked with the restaurant and there is already a dessert included with the meal. All food has to come from the restaurant, and getting a cake is not an option. The groom is young and not much help with ideas, but he’ll help me implement whatever plan we can devise. I already plan to mention how fortunate the bride and groom are to have them as marriage role models in my welcome remarks at the reception, but would love to find a way to do something more personal on their actual anniversary. Any ideas are welcome!

@TexasAggieMom: If you go the picture route, you can get engineers prints done at Staples or Kinko for a very reasonabe price. A 3×4′ print is only $7. You can mount them on foamcore with spray adhesive.

Another idea, if you can pull it off, would be to surprise them by inviting the couple(s) who were their MOH and BM. Obviously, someone would have to know the names and how to contact them. It also will likely only work if they live close by.

Or, find out what their first dance song was and play that for them while they share a special dance. You could present the FMIL with a bouquet of flowers.

I think we’ve figured it out, but if you have more suggestions, please keep them coming. I found this ornament on-line at Things Remembered and plan to engrave it from the bride and groom to his parents with their names, the date and “Thank you for spending your special day making OUR day special!” The snowflake will be a nod to the theme of the kids’ wedding, and the heart to the 26 years they have been together. The groom will present this to them and say a few words about what his parents’ example has meant to him as he begins learning to be a husband and father, etc. Hopefully the restaurant will either allow me to bring in a cake or will make one for them. Thank you again for all the suggestions! These people have taken my daughter into their home and their hearts and truly love her like she is their own – no way I can possibly do enough to thank them for that gift.